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Biosystematics of Genus Lophopyrum

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Abstract

Genus Lophopyrum Á. Löve is a new genus published by the pioneers of genetics Áskell Löve in the Taxon (1980) of the Vol. 29, p. 351. In this paper, Löve also published a new genus Thinopyrum Á. Löve. He defined Lophopyrum as a genus containing the E, EE, EEE, EEEE, and EEEEE genomes and Thinopyrum as a genus containing the J, JJ, JJJ, and JJJJ genomes in the Conspectus of the Triticeae published in 1984. Lophopyrum elongatum (Host) Á. Löve and Thinopyrum junceum (L.) Á. Löve were the type species of the genera Lophopyrum Á. Löve and Thinopyrum Á. Löve, respectively. After more than 20 years of studies showed that the E and J are two very similar genomes, and the difference between them can only be the difference between subtypes of the same genome. Therefore, the report of the Committee on Genome Designations in the 2nd Triticeae International Conference (Logan, Utah, USA, 1995) suggested that the E genome was renamed as the Ee genome while the J genome was renamed as the Eb genome. They are considered to be two variants of the same genome. According to principle of Á. Löve: “a haplome or a combination of haplome for establishing a genus,” they should be combined into one genus because they contained the same genome. Both of these two genera are published on the same page of the same article in 1980. In general, there is no priority between them. Seriously, Lophopyrum is still in front of Thinopyrum. Lophopyrum was identified as containing the E genome when Áskell. Löve established the genus, and the genus should be Lophopyrum instead of Thinopyrum.

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  1. Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, China

    Chi Yen

  2. Triticeae Research Institute, Sichuan Agricultural University, Ya’an, Sichuan, China

    Junliang Yang

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Yen, C., Yang, J. (2022). Biosystematics of Genus Lophopyrum. In: Biosystematics of Triticeae. Springer, Singapore. https://doi.org/10.1007/978-981-19-0015-0_4

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